The resonant frequency of the impeller blades of APU load coInPressoris a target index necessary to be controlled in the process of themaintenance of iIllPeller.是什么意思_The resonant frequency of the impeller blades of APU load coInPressoris a target index necessary to be controlled in the process of themaintenance of iIllPeller.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句